You are an internal auditor for a medium-sized firm Alan , a salaried employee, has been terminated by your firm. His dismissal was processed through the Human Resources department, but the information was not given to the Payroll Office. Checks are mailed to all employees on pay day. Each worker is paid on a weekly basis. The mailing of Alan's pay checks continued for each of the four weeks following his dismissal. You found the error, but not until Alan received four extra pay checks. Alan has refused to return the four extra pay checks - he has actually cashed them. What actions should your firm take? What if Alan had not cashed the checks? What actions should your firm take